SKU: SS20729V Down Treatment: Hydrophobic Fill Power: 800 Fill Weight: 255g (based on size Regular) Insulation Type: Down Weighs: 642g (Regular) Comfort Limit: -3°C Zip Length: 3/4 Length Zip Position: Left Zip Type: Mummy The Nitro 800 is a lightweight, warm bag designed around the traditional mummy bag but with a few unique features that make Sierra Designs bags stand out. Great value for a bag with this much going on. Sierra Designs sa… Nitro 800 35 Degree Down Sleeping Bag